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- เผยแพร่เมื่อ 23 เม.ย. 2017
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What's the difference between welding and brazing, and when is it acceptable to braze a part over welding it? In this video we will go over braze techniques, melting points, chemical composition and everything else you need to know to start brazing with your oxy acetylene setup.
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I love the old school videos showing field or emergency repairs with limited tools. I would like to see videos showing use of carbon torches (both welding and cutting) and brazing of aluminum. I have heard that you can weld aluminum with them using the right flux. Cheers and thanks.
Just to clarify (I am not sure on the terms), when I say carbon welding, I meant using a twin carbon arc torch.
Which videos? please post a link as I see alot of this stuff in old PM magizines. Thanks.
i'm watching this for my welding class and his voice and the crackling of the torch is just, so, soothing, to the point where its hard not falling asleep.
As an A/C guy, I also enjoy brazing. This is not quite the same, as my brazing is non-ferrous, but that’s exactly why I’m here. I love your instructional videos! Thanks
Bob, you made that braze look simple and clean. I think that if I practice about 47 bazillion hours, I might come close. Thanks for your excellent videos!
It doesn't take long to learn, but when you practice be CONSISTENT and practice the same joint until you're proficient, then perform other joints. Spend say an hour between breaks so you can work without interruption.
I learned brazing in High School, took me about a week to get good at it, maybe 5-6 hours total. If you've done regular oxy-acetylene welding, this is about like that but with less melting the steel.
I learned to braze almost 50 years ago and it is still a great way to repair broken cast iron..The problems people encounter usually stem from not cleaning properly, too much heat, not enough flux, etc.... Cheers; Mike in Louisiana
Glad you still stress the basics which gas welding teaches. I'm almost sixty and my first welding class in high school was gas welding and I'm thankful I learned, it made learning all other welding process easier. I also still do repairs and some artistic projects with brazing and soldering, I find it calming.
I'm not quite as old as you, but I'm up there. The first welding process I learned was MIG, followed by TIG. The reason for that is that my father was a certified aircraft welder for the Air Force, and we had MIG and TIG equipment in the garage when I was a kid. He taught me gas welding later as a teenager, and I learned stick welding on my own with the help of a welding textbook. I eventually became certified for different processes and specifications myself even though I never really worked much in the trade. This was back in the day when any college or vocational welding course still started with gas welding, and wouldn't let you touch any electric welding equipment until you had passed your gas welding course.
While my situation was unusual, I am still of the opinion that a person should learn fundamental welding first using oxyacetylene. Compared to electric welding processes, OA is unparalleled for learning puddle and heat control and rod manipulation. It's also the most versatile process, since you can weld, braze, braze weld, solder (overkill, but it does the job) and heat metal for shaping or forging, and with the cutting attachment you can cut, gouge, bevel, etc. Even if you never weld with gas, no metal shop or hobbyist is complete without an OA outfit AND the skill to use it properly.
Of course, if you do have it, you should occasionally forego the MIG, TIG, or stick on a non-appearance-critical steel weldment and use the OA, just to stay in practice. If you stay proficient it will look good and be as strong as the parent metal, and you will actually enjoy the process and won't get an arc tan :)
agreed. I'm 48 in a couple of months. Learned weld as a kid pre-teen from Dad. Went on to be a welder/fabricator in the Army..years later 2012 to be exact . For chits and giggles decided to take a college course in welding from the Local community college. Imagine my surprise looked, when the 27 year old instructor informed me the first day of class. The only OxyAcy we use is a cutting torch. I do not teach gas welding of that type. No one uses it anymore. Later I was informed he was actually a machinist who lucked into the role of teacher. After that I informed the class one day of what they were being screwed on and I would spend time with them after class showing them the real basics of welding. I've asked the college why they allowed this..they never reply..Just saddens me. Promote this kids to exceed in welding.. yet they are taught very little. And the college wonders why they are not hired.
i had a similar exp's when it took a welding program in college,,the teacher (a scotish chap who worked for rolls royce jet engine mfg) told me they wont teach gas welding no more despite there being a few rigs in the class he said it was used by some guys in refrigeration or some other class and that teacher would be pissed if gas was low in the tanks,so i learned mig and stick first then tig where we moved from ms to ss but the sob teacher would not let me work on SS (or was it al?)because it was too costly and he was worried about having the school waste money buying more of it and affecting his class budget or whatever ,so instead he tried to cheat us with steel saying it was the same ,no one else noticed or asked despite us paying for a tig course in that specific material,so i went to the dept and complained and the very next day he gave me the material ,i think he knew i was the one who must have complained lol but seriously they only teach you safety,some basics on electricity with the machines and how to run the machines and basics in welding techniques and its mostly you on your own hands on ,no metallurgy science or nothing like the old days ,all that stuff you need to pick up on your own
Welding with a torch first is the best way because as I have seen it makes you more aware of heat transfer and what it takes to heat up metals.
Most of the places I have worked and most of the knucklehead welders I have worked with don't seem to pay any attention to heating of metal or heat flow or anything. They think just strike an arc on an ice cold heavy block of metal and everything will be fine.
Or lay down a nice fast cold MIG weld that you can peel up with a chisel.
AHH the great smell of brazing ,The oxy acetylene process/ brazing was the first welding process I learned in vo tech. Many people dont realize the incredible strength of brazing I remember brazing broken gear teeth that saved thousands of dollars. To replace the gear was over $2700 dollars and to repair it was about $20.... great job.
Yup. It's still the only process commonly used on saw blades. Have you see what a well made saw blade costs? Check out Forrest blades, they're the best made in America blades you can get and you pay for it, too! I was surprised to see even the diablo blade I bought from Freud for my sawzall even has brazed carbide teeth on it. She's an absolute beast with that blade on it!
Damn your right thinking about it. Never thought brazing was that strong
@@jamesavery6671 50,000psi typical, up to 65,000psi for a good braze weld with low fuming bronze. Silicon bronze and the aluminum bronzes are even stronger, but less ductile and shock resistant.
@ARCTURUS "...The oxy acetylene process/ brazing was the first welding process I learned in vo tech...." Same with my son. He did some very nice braze welds, as well as steel. When he got around to TIG welding, it was a cinch.
Its such a pleasure to watch your videos. Its obvious that you are passionate about your trade and a great teacher. Thanks for doing what you do!
Thanks for doing this video Bob. Haven't brazed in about a thousand years but can remember using it on a lot of things in the past and recall admiring how surprised I was at the strength of the bond. I hope the students attending your class realize how lucky they are to have someone like you teaching them.
So happy to see and hear someone still teaching base welding tech. Gas [oxy-act] along with brazing. Low Fuming Bronze brazing is what I learned first back in '75. Glad I rolled into your channel.
I truly dig this tutorial, it shows or teaches so much in such short time, the distance of the tip not being constant was the biggest tip I learned. I also watch your videos more than others because being left handed, I can mimic/ follow your movements easier. overall, everything makes more sense. thank you.
Genuinely love your guy's videos, old and new. Your use and expertise of not only the welding methods and knowledge but also the camera footage you provide makes it so much easier for me to learn how to do these processes myself. Thank you!
Started gas weldng/brazing this weekend. Your video has helped in knowing what I SHOULD be doing and what to expect when it is done correctly.
Some of the best brazing I've seen in a while. Excellent technique and control. Thank you!
I learned more in 14.5 minutes here than I have in the last year trying to learn this through practice. Thank you so much!
Thank you for taking the time and effort to make an educative video in which we can learn the science behind “welding”. You show that it’s not just what you learned watching others weld but the fact that there is a science behind all. Thank you.
Bob, you rock! Love watching your videos. Lots of variety from a guy who really knows his stuff. Keep up the great work.
Great Video. Shows how its done. Did a lot of Brazing in the late 60s, early 70s and then got away from it. It is like Tig and it looks so Pretty when your done.
Great video. Really interesting to see some brazing being done. You did a great job of filming the molten puddle, very clear. It really helped in seeing what was going on. Thanks!
Thank you for showing us all how to make brazing happen. This was taught when I was in school metal shop. Some of the fondest time spent in shop class. Today they do not even have shop classes or even music class so i am told. Nicely done fella too.
I appreciate your knowledge and how you show others the skill of brazing. Very informative .Thank You
Great method! I use it alot on exhaust manifolds insted of welding. Works great!!
Very enjoyable seeing little used techniques. I was taught at General Motors Fisher Body in NJ in 69 oxy acetylene wire weld and lead joints and using weld wire to make rivets on metal to join panels . I miss it and really enjoy seeing a welder doing his craft well. I am always telling young kids there is so much out there And it pays well and you have a nice product when you are done . Such a Blessing !Thanks you for providing Good resource.
I took a welding class in adult education and loved it. Our class was divided in half...one side learned stick and Mig...the other oxyacetylene and stick. Unfortunately, I didn’t get the opportunity to learn the oxyacetylene because we ran out of time. I’m thinking of just going and buying a set and teach myself. Your vids help immensely!
thanks for all your efforts making these videos , this one took me back to my grand dad and memories that I cherish ! thank you
this guy is a great teacher. one detail for those who are interested - it is not capillary action that joins the surfaces, they join as a result of molecular interaction of the liquid metal with the solid metal, caused by wetting.
in school my old agg teacher was a retired pipeline welder this was my first weld he taught me
Very nice presentation! Excellent video recording! This takes me back about 40 years to auto body school and as you stated the progression of torch first and then wire welding MIG. I later in life learned silver brazing with 15% and 45% silver depending on the application. I cannot thank my junior year teacher for teaching us the techniques! (Never learned to TIG but assuming at 55 the need to learn is pretty low)
Oxy acetylene, or gas welding and brazing is great! I learned it first along with cutting. Then I learned using propane. It is still my failsafe go to. I will never forget the comments the first time someone watched me literally weld a copper heat exchanger with gas. I use a lot of high tech today but still love old school gas.
Keep your great videos comming! You are doing the trade a great service by being a excellent teacher!
What is the difference with Propane? What pressures do you use for oxygen and propane, do you use the tip of the cone? Do you get more blackening of the tubes? Love the answers to those questions please.
Good video. Very easy to listen to...no pointless rambling. Learned lots already....Thanks!!
This was everything I could have wanted in an instructional video sir. Thank you very much!
Bob. Thanks for this. Thanks for what you do here and how you teach. Your teaching style is nicely refined. Your knowledge and talent being shared is greatly appreciated by me and by many I'm sure.
This 60yo firefighter is learning a bunch from you.
I have a 1200 sq ft "man shed" that has just gained a budget arc welder. With your assistance, I am teaching myself how to weld and work with metal. Something I've always been interested in but never had the funds nor time to pursue.
Now? Bring it on, buddy. I'm ready.
This is a really good skill to have under your belt as a welder. This was one of the first things I learned as a young kid with a full set of bottles and a butt load of time. I learned a skill and kept out of trouble at the same time. Idle hands being the devils workshop. Thanks for the look back.
Got my first welder for christmas and I am so excited to get fully into it
Awesome video. Just inherited an oxe/acetylene system. This was very helpful.
So glad I bumbled upon this channel. I have been thinking of learning to do some basic welding, just hobby, decorative stuff. I have found good welders to be more $$$ than I can put out at this time. Brazing will do great to meet my needs. Thank you so much.
Great video. It’s nice to see a technique that can be utilized without using a lot of expensive equipment.
Love this I still braze a good deal . Thank you for this video to refresh me with the basics.
Really enjoy your instructional techniques find them very informative . Keep up the great classes. Thanks
In my two year course, I started with OAW, went to TIG, SMAW, then MIG.
Informative, technical, and easy on the ears. Yeah man, you're good.
Love your teaching style. Thanks for this.
Same technique for our shipboard repairs back in the 80's. Nice job.
A nice pace, clear and informative. Thanks
Keep them coming! Really enjoy your videos. Learn a lot and get different ways to accomplish the the same things.
Love the 2 cam shots, Bob. Excellent vid!
It seems that if you'd have put higher heat into it, you would get partial drips on the other side. I appreciate the tight camera shots showing the technique.
Perhaps. Honestly I'm only familiar with copper and silver rods used for HVAC brazing.
The rods he,s using seems to be almost 40% zinc. Its practically brass.
It looks much less fluid than the silver rods used for brazing copper HVAC pipes.
Enjoy the lesson Sir! Thank you
Great videos. Top notch instructor. Skilled, old school craftsman. Awesome.
I just purchased some tanks and torches because of this awesome tutorial. Thanks for sharing
Great close up of the flame and rod intersection!
You always tell me exactly what I need to know just when I realise what I need to know.
When I still lived in England my home country I used to build race car chassis we used use sifbronze its a dying art great to see you doing this
Great to see this, I still do quite a bit of gas brazing and always enjoy it
Where can I buy the tanks, hose etc?
I like the hand slide technique @7:14 lol. Awesome work, we're lucky to have your videos to learn
That colour is gorgeous
Great stuff Bob. I think gas brazing was tried years ago before actual gas welding. Time I tried that again - you make it look easy :-)
So good to see these videos, Bob! I learned these things in high-school and by teaching myself, and now that I'm retired, I'm picking them back up to keep busy, and fix things for family members.
Thanks again!
Good to hear.
"pretty good size gap, if you can (say) see that on camera"
he said if you can see
What a great Job of teaching you do! Also great. You never stop learning Thanks !!!!
great content, delivered in an interesting way... thank you
I like learning the terminology of welding e.g...Thanks
Nice work. THANKS FOR SHARING.
That is how I learned. Bare P bronze with AntiBorax flux. Victor 100. The phosphor bronze rod is eutectic so once it reaches melting point, it flows like water. Also used food grade silver bearing for stainless matching. Still have that flux in my tool box.
very interesting. you are an excellent trainer
1:20 in the books it seems super intimidating thanks for breaking it down for beginners so well
Really enjoyed your video. So informative and well presented. Thanks!
Great video, Bob.
That is a beautiful work, great video
2nd best channel to learn anything related to welding brazing soldering. Your students are lucky to have such a great teacher with a wealth of knowledge. Who is 1st.................😃
always learning thanks
That was great insight, thanks fir your time. I really enjoy watching your videos. Unfortunately I don't have time to go to a school to learn the proper way so I need to rely on these TH-cam videos and I'm glade I came across this channel. Thanks again. When my kids are big enough they will learn welding at a school prior to any college.
Outstanding job Sir!
Great video and amazing skills. Thank you for this!
Excellent teacher!!
Great vid and easy to follow.
This video helped me alot I had never done it and had to find out for work and by the 4th pass I had it looking great
Outstanding video.
good stuff ,Bob...nice watching
I have finally got of my ass to learn what the definition of “brazing “ actually is and was oh so fortunate to find your video. I know nothing about welding and am developing an interest to pursue it. You sir, are an excellent instructor. Wish I was in your area (wherever that is ) so that I could take a class from you. Excellent, comprehensive video. Thanks so much.
My father in law restored his 1957 by brazing all the replacement panels in. We worked on an old 68 Chevelle we pulled out of the weeds and we started to strip the body. The quarter was replaced and at some point in the past, once we got down to the seam...by George it was brazed! Very very strong!
Thank you for uploading!
Awesome, I have not seen this done in 40 years.
My first brazing class for my apprenticeship is in 1 month. Time to learn.
very cool video~ just did some brazing to make a condensate pan at work for hvac job. While working at a body shop years ago seen the foreman do some brazing on a wrecked truck and I was amazed at how it looked just like a row of dimes from a tig weld . I have tried over and over but could never get that look of the row of dimes
I do silver solder for a living. I work with stainless,copper,brass.....sometimes all in the same part! I often wondered what more i could do with this skill? Doing something neat like this looks like a lot of fun!
Thanks, great video. Love Old School.
The type of teacher teaching the kids chemical comp of metals before striking an arc.
fantastic. I learnt things. Thank you
Excellent,the basics it where it all starts.
Learned braze welding in navy weld school years ago. We were taught a different technique that that leaves the bond looking like a really nice weld bead. I see that you pull the flame outward. What we were taught was more similar to SMAW with say a 6011 rod. The filler rod and the flame move back and forward together like a dance. We'd move the flame back (not out), bring the rod in and "dip," then move the flame and puddle forward. The rod always remaining in the flame envelop as well. A very intimate dance. In this way, the flame envelope seems to better prevent contamination and I found that it allows you to control the process better and without as much manipulation. It also seems faster to me. Like 6011, one might maneuver a bit side to side to wet in stubborn edge point, but generally a back and forth motion. We also got to do this in the over head position on . . . ahhhh! Cool video. Thanks
Very enjoyable video and great tips, thanks!
Great video. Thank you
thanks your a great teacher. i have seen several of you video's and your right to the point. Kudo's !
thanks i learned oxy acetylene in high school ,long ago,now im a beekeeper and want to braze copper to make a oxalic acid vaporizor for mite treating hives,solder too low melting,so im going to try oxy / map little brazing kit,i like your explanations,soon im going to harbor freight for a tig set up, to compliment my mig,ill be following...
That reminds me when I was young used to braise in patch panels
Some people watch basketball, baseball or football, but I could watch this stuff for hours. I might be building a Legal Eagle XL and brazing is the main method for connecting all the frame pieces together.
Brazing has a lot of haters in people who don't even know much about it. It's my go to. I've found it easy to learn, less distractions with no metal popping all over and just generally cleaner and less stressful to begin with. A lot of it is almost as strong and best of all it never rusts!
Great video. Thanks
good welds, thank you for shearing your knowledge!